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arXiv · 1510.09113

Starobinsky Model in Rainbow Gravity

Auttakit Chatrabhuti·Vicharit Yingcharoenrat·Phongpichit Channuie
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Abstract

In this paper, we study the Starobinsky model of inflation in the context of gravity's rainbow theory. We propose that gravity rainbow functions can be written in the power-law form of the Hubble parameter. We present a detailed derivation of the spectral index of curvature perturbation and the tensor-to-scalar ratio and compare the predictions of our models with Planck 2015 data. We discover that in order to be consistent with Planck data up to $2\sigma$ C.L., the viable values of $N_{k}$ $e$-folds would satisfy $42\lesssim N_{k}\lesssim 87$ and the rainbow parameter $\lambda$ is nicely constrained to be $\lambda \lesssim6.0$.

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Auttakit Chatrabhuti, Vicharit Yingcharoenrat, Phongpichit Channuie. 2015-10-30. Starobinsky Model in Rainbow Gravity. https://doi.org/10.1103/physrevd.93.043515

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